Lukas
ec91c1c8b2
Wire DEFAULT_BLOCKING_EXECUTOR as the default executor in backend/app/utils/async_utils.py, preserving custom executors and marking Task 22 completed in Docs/Tasks.md.
46 lines
1.3 KiB
Python
46 lines
1.3 KiB
Python
"""Async execution utilities.
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Provides a shared thread-backed executor abstraction and helpers for
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running blocking callables without stalling the FastAPI event loop.
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"""
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from __future__ import annotations
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import asyncio
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import functools
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from concurrent.futures import ThreadPoolExecutor
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from typing import Callable, ParamSpec, TypeVar
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P = ParamSpec("P")
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T = TypeVar("T")
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DEFAULT_BLOCKING_EXECUTOR: ThreadPoolExecutor = ThreadPoolExecutor(
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max_workers=16,
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thread_name_prefix="bangui-blocking",
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)
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async def run_blocking(
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func: Callable[P, T],
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*args: P.args,
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executor: ThreadPoolExecutor | None = None,
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**kwargs: P.kwargs,
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) -> T:
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"""Run a blocking callable in the shared thread pool.
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Args:
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func: Blocking callable to execute.
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*args: Positional arguments for the callable.
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executor: Optional custom executor. Defaults to the shared pool.
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**kwargs: Keyword arguments for the callable.
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Returns:
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The callable return value.
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"""
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loop = asyncio.get_running_loop()
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executor = DEFAULT_BLOCKING_EXECUTOR if executor is None else executor
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if kwargs:
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func = functools.partial(func, *args, **kwargs)
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return await loop.run_in_executor(executor, func)
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return await loop.run_in_executor(executor, func, *args)
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